CN112460032A - Conveying device for copper-nickel-zinc waste pretreatment process - Google Patents
Conveying device for copper-nickel-zinc waste pretreatment process Download PDFInfo
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- CN112460032A CN112460032A CN202011434923.XA CN202011434923A CN112460032A CN 112460032 A CN112460032 A CN 112460032A CN 202011434923 A CN202011434923 A CN 202011434923A CN 112460032 A CN112460032 A CN 112460032A
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- guide vane
- nickel
- copper
- guide
- iron
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a conveying device for a copper-nickel-zinc waste pretreatment process, which mainly comprises the following steps: preparing materials and pulping, b, neutral leaching, c, oxidizing to remove iron, d, extracting, e, washing nickel, f, back extracting, g, removing iron, and h, washing oil; conveyor includes a plurality of delivery pumps, and delivery pump is used for carrying acid, alkali or sewage, and delivery pump's impeller includes front shroud (1), back shroud (2), blade (3), first guide vane (4), second guide vane (5), its characterized in that: the outer diameters of the blades, the first guide vanes and the second guide vanes are equal, the inner diameters of the blades are different, one first guide vane and two second guide vanes are arranged between every two adjacent blades, the first guide vane is located between every two adjacent second guide vanes, and the inner diameter of the first guide vane is smaller than that of the second guide vane. Through the design of the first guide vane and the second guide vane, the cavitation resistance of the centrifugal pump can be improved, the reduction of the flow of the outlet of the impeller is prevented, and the pump is prevented from being blocked, so that the performance and the service life of the delivery pump are improved, and the production cost is saved.
Description
Technical Field
The invention relates to the technical field of copper-nickel-zinc waste pretreatment (recycling), in particular to a conveying device for a copper-nickel-zinc waste pretreatment process.
Background
The waste containing copper, nickel and zinc is classified and pretreated according to the grades of different metals, a material containing high copper and zinc and low nickel (low nickel material Ni < 1%) and a material containing high nickel and low copper and zinc (high nickel material Ni > 1%) are separated, and the high nickel material and the low nickel material are respectively and separately treated. The processes of material preparation, neutral leaching and oxidation iron removal in the pretreatment process of the high-nickel material and the low-nickel material are consistent, an extraction impurity removal process is added after the high-nickel material is oxidized and removed with iron, and the extraction impurity removal process is formed by modifying an extraction line of an original extraction workshop.
As shown in fig. 1, the copper nickel zinc scrap pretreatment process in the prior art generally comprises the following process steps: preparing materials and pulping, b neutral leaching, c oxidizing to remove iron, d extracting, e washing nickel, f back extracting, g back iron and h washing oil. In which, a large number of delivery pumps are usually used for delivering various liquids/mixed liquids (such as acid, alkali, sewage, etc.), and the performance and life of the delivery pumps have little influence on the reaction efficiency and production cost of each process.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a conveying device for a copper-nickel-zinc waste pretreatment process.
In order to achieve the purpose, the invention adopts the technical scheme that:
a conveying device for a copper-nickel-zinc waste pretreatment process mainly comprises the following steps: preparing materials and pulping, b, neutral leaching, c, oxidizing to remove iron, d, extracting, e, washing nickel, f, back extracting, g, removing iron, and h, washing oil; conveyor includes a plurality of delivery pumps, delivery pump is used for carrying acid, alkali or sewage, delivery pump includes the spiral case, the impeller includes front shroud (1), back shroud (2), blade (3), first guide vane (4), second guide vane (5), a plurality of blades are connected between front shroud and back shroud along circumference evenly distributed, a plurality of first guide vane, a plurality of second guide vane distribute along circumference, first guide vane, second guide vane, the blade sets up along the crisscross interval of circumference, be provided with first guide vane between the two adjacent blades, second guide vane, its characterized in that: the outer diameters of the blades, the first guide vanes and the second guide vanes are equal, the inner diameters of the blades are different, one first guide vane and two second guide vanes are arranged between every two adjacent blades, the first guide vane is located between every two adjacent second guide vanes, and the inner diameter of the first guide vane is smaller than that of the second guide vane.
Further, the vanes (3) have an axial height H, the first guide vane (4) has an axial height H2, and the second guide vane 95 has an axial height H1, H > H1 > H2.
Further, the H1= (0.15-0.35) H, H2= (0.075-0.175) H, H1= (1.5-2.5) H2.
Furthermore, the delivery pump is a corrosion-resistant anti-blocking centrifugal pump made of stainless steel or acid-base-resistant high-molecular engineering plastics.
Further, the first guide vane (4) has an inner edge radius R2, the second guide vane (5) has an inner edge radius R1, and the vanes (3) have an inner edge radius R, R1= (0.70-0.85) R, and R2= (0.6-0.75) R.
Further, in the neutral leaching process: after feeding, adding water, sulfuric acid, waste acid, centrifugal dehydration mother liquor and nickel sulfate cathode copper system impurity removal stripping liquor for neutral leaching; when the neutral leaching is finishedFe at point control pH = 4.0-4.53+Hydrolysis reaction occurs to generate ferric hydroxide precipitate, arsenic becomes indissolvable ferric arsenate double salt, and ferric hydroxide colloid adsorbs, coagulates and precipitates to separate out.
Further, in the oxidation iron removal process: the feed liquid after neutral leaching enters an oxidation iron removal process, and Fe which is not completely purified in the neutral leaching process is removed2+Removing impurities; by means of H2O2As an oxidant, lime is used for adjusting pH = 4.0-4.5, Fe3+Carrying out hydrolysis reaction to generate ferric hydroxide precipitate, wherein the filtrate after filter pressing is iron-removed liquid, and the high-nickel iron-removed liquid is subjected to extraction and impurity removal and then enters a nickel sulfate line; wherein the operating conditions and control parameters are: fe before iron removal2+: (500-1000) mg/L; fe after iron removal2+: less than 50 mg/L; pH = 4.0-4.5; heating temperature: (55-60) DEG C.
Compared with the conveying pump in the prior art, the conveying device (conveying pump) for the copper-nickel-zinc waste pretreatment process can improve the cavitation resistance of the centrifugal pump and prevent the reduction of the flow at the outlet of the impeller/the blockage of the pump by the design of the first guide vane and the second guide vane, thereby improving the performance and the service life of the conveying pump and saving the production cost.
Drawings
FIG. 1 is a schematic view of a prior art copper nickel zinc scrap pretreatment process;
FIG. 2 is a schematic structural diagram of a conveying device for the copper-nickel-zinc waste pretreatment process according to the present invention;
FIG. 3 is a schematic structural diagram of a conveying device for the copper-nickel-zinc waste pretreatment process according to the present invention.
In the figure: the air-conditioning fan comprises a front cover plate 1, a rear cover plate 2, blades 3, first guide blades 4 and second guide blades 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a conveying device for a copper nickel zinc waste pretreatment process mainly comprises the following steps: preparing materials and pulping, b neutral leaching, c oxidizing to remove iron, d extracting, e washing nickel, f back extracting, g back iron and h washing oil.
a, preparing materials and pulping: the copper, zinc and nickel containing waste is sent into a closed hopper by a travelling crane and is quantitatively put into a leaching reaction kettle by a metering system. During material mixing, according to the detection result of the components of the raw materials, the nickel content of the high-nickel material is controlled to be 20% -30%, the zinc content of the low-nickel material is controlled to be 25% -35%, and material feeding is started respectively.
b, neutral leaching: after feeding, adding water, sulfuric acid, waste acid, centrifugal dehydration mother liquor and nickel sulfate cathode copper system impurity removal stripping liquor for neutral leaching. Neutral leaching is an important link in a wet production process of a copper-nickel-zinc system, and zinc, cadmium, copper, nickel, cobalt, iron and the like in raw materials are dissolved in the process. Fe when the leaching end point is controlled to have pH = 4.0-4.53+Hydrolysis reaction occurs to generate ferric hydroxide precipitate, arsenic becomes indissolvable ferric arsenate double salt, and ferric hydroxide colloid adsorbs, coagulates and precipitates to separate out. As known from chemical reaction, acid is generated during hydrolysis, and as the acidity increases with the hydrolysis, the reaction must be continuously neutralized to remove the acid so as to maintain Fe in the solution3+Hydrolysis should have a pH value. In the invention, the acid generated by hydrolysis is consumed by the added raw materials when being dissolved, and the requirement of controlling the pH value at the end point can be met without adding a neutralizing agent.
c, oxidation and iron removal: the feed liquid after neutral leaching enters an oxidation iron removal process, and Fe which is not completely purified in the intermediate leaching process is removed2+And removing impurities. By means of H2O2As an oxidant, lime is used for adjusting pH = 4.0-4.5, Fe3+Hydrolysis reaction occurs to generate ferric hydroxide precipitate. The filtrate after filter pressing is the liquid after iron removal; the low nickel iron-removing liquid enters a nickel sulfate/cathode copper system, and the high nickel iron is removedAnd the post liquid is extracted to remove impurities and then enters a nickel sulfate wire. Operating conditions and control parameters: fe before iron removal2+: (500-1000) mg/L; fe after iron removal2+: less than 50 mg/L; pH = 4.0-4.5; temperature: (55-60) DEG C (steam indirect heating).
d, extraction: performing 6-stage countercurrent extraction on the iron-removed liquid and the soap-converted organic phase to enable impurities and a P507 extractant to generate an extract compound to enter an organic phase, wherein the clarified and layered organic phase is a loaded organic phase, and the water phase is a raffinate; the raffinate is pure nickel sulfate solution and is sent to the oil removal process for treatment.
e, nickel washing: and (3) carrying out 6-stage countercurrent nickel washing on the loaded organic and dilute sulfuric acid to recycle nickel extracted from the organic containing impurities into a water phase, wherein the organic phase after washing and layering is the washed organic phase, the water phase is washed water, and the washed water is a nickel-containing solution and returns to the oxidation acid leaching process as bottom water.
f, back extraction: and (3) carrying out 5-stage countercurrent impurity removal on the washed organic and dilute sulfuric acid to recover copper and other small amount of impurities extracted from the impurity-containing organic into a water phase, wherein the organic phase after impurity removal and layering is the impurity-removed organic phase, the water phase is impurity removal water, the impurity removal water is an acid solution containing copper and zinc, and a copper-zinc system is opened.
g, back iron: and (3) carrying out 3-stage countercurrent iron-stripping with dilute hydrochloric acid to recover all iron extracted from the organic phase into the water phase, wherein the organic phase after iron-stripping is blank organic, the water phase is molten iron, the molten iron is recycled, and the zinc system is opened by opening a circuit regularly.
h washing the oil.
The conveying device comprises a plurality of conveying pumps, the conveying pumps are used for conveying liquid/mixed liquid such as acid, alkali or sewage, and the conveying pumps are corrosion-resistant (acid and alkali-resistant) anti-blocking centrifugal pumps.
As shown in fig. 2-3, a conveyor for copper nickel zinc waste material pretreatment process, conveyor includes a plurality of delivery pumps, the delivery pump includes spiral case, impeller, the impeller includes front shroud 1, back shroud 2, blade 3, first guide vane 4, second guide vane 5, a plurality of blades 3 along circumference evenly distributed connect between front shroud 1 and back shroud 2, a plurality of first guide vane 4, a plurality of second guide vane 5 along circumference distribution, first guide vane 4, second guide vane 5, blade 3 is along the crisscross interval setting of circumference, be provided with first guide vane 4, second guide vane 5 between two adjacent blades 3, its characterized in that: the outer edge/outer diameter of each of the blades 3, the first guide vane 4 and the second guide vane 5 is equal, the inner edge/inner diameter is unequal, one first guide vane 4 and two second guide vanes 5 are arranged between every two adjacent blades 3, the first guide vane 4 is positioned between every two adjacent second guide vanes 5, and the inner diameter of the first guide vane 4 is smaller than the inner diameter of each second guide vane 5.
Further, the vanes 3 have an axial height H, the first guide vane 4 has an axial height H2, the second guide vane 5 has an axial height H1, H > H1 > H2, and H is much greater than H1, H2.
Compared with the conveying pump in the prior art, the conveying device (conveying pump) for the copper-nickel-zinc waste pretreatment process can improve the cavitation resistance of the centrifugal pump and prevent the reduction of the flow at the outlet of the impeller/the blockage of the pump by the design of the first guide vane and the second guide vane, thereby improving the performance and the service life of the conveying pump and saving the production cost.
Further, H1= (0.2-0.3) H, preferably 0.25; h2= (0.1-0.15) H, preferably 0.125; h1= (1.7-2.3) H2, preferably 2.
Further, the first guide vane 4 has an inner edge radius R2, the second guide vane 5 has an inner edge radius R1, the vane 3 has an inner edge radius R, R1= (0.72-0.82) R, preferably 0.77; r2= (0.63-0.73) R, preferably 0.68.
The transfer pump is a corrosion-resistant anti-clogging centrifugal pump, and the material of the transfer pump is stainless steel (such as duplex stainless steel) or acid-base-resistant high-molecular engineering plastic.
According to the conveying device (conveying pump) for the copper-nickel-zinc waste pretreatment process, the first guide vane and the second guide vane are designed, so that the cavitation resistance of the centrifugal pump can be improved, the flow of the outlet of the impeller is prevented from being reduced, the pump is prevented from being blocked, the performance and the service life of the conveying pump are improved, and the production cost is saved.
The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (7)
1. A conveying device for a copper-nickel-zinc waste pretreatment process mainly comprises the following steps: preparing materials and pulping, b, neutral leaching, c, oxidizing to remove iron, d, extracting, e, washing nickel, f, back extracting, g, removing iron, and h, washing oil; conveyor includes a plurality of delivery pumps, delivery pump is used for carrying acid, alkali or sewage, delivery pump includes the spiral case, the impeller includes front shroud (1), back shroud (2), blade (3), first guide vane (4), second guide vane (5), a plurality of blades are connected between front shroud and back shroud along circumference evenly distributed, a plurality of first guide vane, a plurality of second guide vane distribute along circumference, first guide vane, second guide vane, the blade sets up along the crisscross interval of circumference, be provided with first guide vane between the two adjacent blades, second guide vane, its characterized in that: the outer diameters of the blades, the first guide vanes and the second guide vanes are equal, the inner diameters of the blades are different, one first guide vane and two second guide vanes are arranged between every two adjacent blades, the first guide vane is located between every two adjacent second guide vanes, and the inner diameter of the first guide vane is smaller than that of the second guide vane.
2. The conveyor for the copper nickel zinc scrap pre-treatment process according to the claim 1, characterized in that the vanes (3) have an axial height H, the first guide vanes (4) have an axial height H2 and the second guide vanes 95 have an axial height H1, H > H1 > H2.
3. The conveying device for the copper-nickel-zinc waste pretreatment process according to claim 2, wherein the H1= (0.15-0.35) H, H2= (0.075-0.175) H, H1= (1.5-2.5) H2.
4. The conveying device for the copper-nickel-zinc waste pretreatment process as claimed in claim 3, wherein the conveying pump is a corrosion-resistant anti-clogging centrifugal pump made of stainless steel or acid-and-alkali-resistant polymer engineering plastics.
5. The conveying device for the copper-nickel-zinc scrap pretreatment process according to claim 4, wherein the first guide vane (4) has an inner edge radius R2, the second guide vane (5) has an inner edge radius R1, and the vanes (3) have an inner edge radius R, R1= (0.70-0.85) R, R2= (0.6-0.75) R.
6. The conveying device for the copper-nickel-zinc scrap pretreatment process according to claim 1, wherein in the neutral leaching process: after feeding, adding water, sulfuric acid, waste acid, centrifugal dehydration mother liquor and nickel sulfate cathode copper system impurity removal stripping liquor for neutral leaching; fe when the neutral leaching end point controls the pH to be = 4.0-4.53+Hydrolysis reaction occurs to generate ferric hydroxide precipitate, arsenic becomes indissolvable ferric arsenate double salt, and ferric hydroxide colloid adsorbs, coagulates and precipitates to separate out.
7. The conveying device for the copper-nickel-zinc waste pretreatment process according to claim 6, wherein in the oxidation and iron removal process: the feed liquid after neutral leaching enters an oxidation iron removal process, and Fe which is not completely purified in the neutral leaching process is removed2+Removing impurities; by means of H2O2As an oxidant, lime is used for adjusting pH = 4.0-4.5, Fe3+Carrying out hydrolysis reaction to generate ferric hydroxide precipitate, wherein the filtrate after filter pressing is iron-removed liquid, and the high-nickel iron-removed liquid is subjected to extraction and impurity removal and then enters a nickel sulfate line; wherein the operating conditions and control parameters are: fe before iron removal2+: (500-1000) mg/L; fe after iron removal2+: less than 50 mg/L; pH = 4.0-4.5; heating temperature: (55-60) DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011434923.XA CN112460032A (en) | 2020-12-10 | 2020-12-10 | Conveying device for copper-nickel-zinc waste pretreatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011434923.XA CN112460032A (en) | 2020-12-10 | 2020-12-10 | Conveying device for copper-nickel-zinc waste pretreatment process |
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| CN112460032A true CN112460032A (en) | 2021-03-09 |
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| CN202011434923.XA Pending CN112460032A (en) | 2020-12-10 | 2020-12-10 | Conveying device for copper-nickel-zinc waste pretreatment process |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426027Y (en) * | 1999-03-13 | 2001-04-04 | 格伦德福什联合股份有限公司 | Radial structure type impeller for centrifugal pump |
| CN102465912A (en) * | 2010-11-15 | 2012-05-23 | 胜达因公司 | Flow vector control for high speed centrifugal pumps |
| CN105274332A (en) * | 2015-11-20 | 2016-01-27 | 金川集团股份有限公司 | Isolation technology and process for extracting Ni and Co from nickel-containing high-cobalt hydroxide |
| US20160377088A1 (en) * | 2010-02-26 | 2016-12-29 | Ventions, Llc | Small scale high speed turbomachinery |
| CN108916109A (en) * | 2018-06-06 | 2018-11-30 | 江苏大学 | A kind of Semi-open centrifugal pump impeller and its optimum design method |
| CN109706319A (en) * | 2018-12-30 | 2019-05-03 | 温贵能 | Method low cost recycling metal from electroplating sludge and produce refined sulfuric acid nickel |
| CN110439855A (en) * | 2019-09-04 | 2019-11-12 | 盐城工业职业技术学院 | A kind of centrifugal blower applied to air conditioning for automobiles ventilating system |
| CN111536049A (en) * | 2020-05-22 | 2020-08-14 | 江西斯米克陶瓷有限公司 | Conveying device for ceramic product production |
-
2020
- 2020-12-10 CN CN202011434923.XA patent/CN112460032A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426027Y (en) * | 1999-03-13 | 2001-04-04 | 格伦德福什联合股份有限公司 | Radial structure type impeller for centrifugal pump |
| US20160377088A1 (en) * | 2010-02-26 | 2016-12-29 | Ventions, Llc | Small scale high speed turbomachinery |
| CN102465912A (en) * | 2010-11-15 | 2012-05-23 | 胜达因公司 | Flow vector control for high speed centrifugal pumps |
| CN105274332A (en) * | 2015-11-20 | 2016-01-27 | 金川集团股份有限公司 | Isolation technology and process for extracting Ni and Co from nickel-containing high-cobalt hydroxide |
| CN108916109A (en) * | 2018-06-06 | 2018-11-30 | 江苏大学 | A kind of Semi-open centrifugal pump impeller and its optimum design method |
| CN109706319A (en) * | 2018-12-30 | 2019-05-03 | 温贵能 | Method low cost recycling metal from electroplating sludge and produce refined sulfuric acid nickel |
| CN110439855A (en) * | 2019-09-04 | 2019-11-12 | 盐城工业职业技术学院 | A kind of centrifugal blower applied to air conditioning for automobiles ventilating system |
| CN111536049A (en) * | 2020-05-22 | 2020-08-14 | 江西斯米克陶瓷有限公司 | Conveying device for ceramic product production |
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